Green Transit Solutions

Introduced to the market in 1994, New Flyer’s heavy-duty compressed natural gas (CNG) transit bus can meet your transit agency’s low-emission needs today.

CNG propulsion emits 90% less nitrogen oxide (NOx) than diesel engines.

CNG offers direct solutions to your low-emission challenges.

Deploying low and zero-emission technology is a critical part of reducing greenhouse gas (GHG) emissions.With clean, safe, and readily available technology, CNG propulsion emits 90% less nitrogen oxide (NOx) than diesel engines — and meets particulate matter levels without the need of a filter.

Extensive Experience

With nearly 13,000 CNG buses delivered across North America, New Flyer has been the CNG leader for 25 years, offering unmatched expertise in the design and deployment of low-emission transit buses for cleaner air and healthier communities.



CNG is made by compressing natural gas, storing it in cylindrical tanks placed on the roof, and distributing to engine systems through a main fuel supply line.

How it works

CNG fuel systems transfers high-pressure natural gas from the storage tank through the main fuel supply line to a fuel block manifold and filter.  The natural gas pressure level is reduced using a pressure regulator to be compatible with the engine fuel injection system. Fuel is then introduced into the intake manifold or combustion chamber.


Another low-emission option for the proven Xcelsior® platform, boasting the same features and industry-proven durability, with 25 years of unmatched expertise in CNG technology.


  • Available in 35-foot, 40-foot and 60-foot configurations
  • Provide an extended range of 350-400 miles
  • Clean, safe, and readily available, CNG buses emit virtually no visible particulate matter, directly reducing GHG emissions and smog
  • Exceeds today’s CNG standards and safety requirements including a complete fire suppression system on every bus
  • Can be immediately deployed and scaled with minimal infrastructure resources
  • Industry-leading passenger carrying capacity with the strategic weight distribution of our components
  • Easy to maintain; CNG eliminates the need for particulate filters and regeneration cycles

Commitment to clean, safe, and sustainable transit

New Flyer Xcelsior® buses carry millions of people to their destinations every day, and this is not a responsibility we take lightly. Together with leading transit agencies, we are proud to deliver safe and low-emission mobility solutions for communities, and will continue working to restore clean air for the millions of North Americans who reside in areas with exceedingly poor air quality.

Low-emission excellence

Xcelsior® CNG buses conform to the EPA and NHTSA comprehensive Heavy-Duty National Program, reducing fuel consumption for heavy-duty highway vehicles. This low-emission mobility option works to combat global climate change and aggressively reduce greenhouse gas (GHG) emissions from heavy-duty vehicles, the fastest growing segment of U.S. transportation for energy use and emissions.

Proven design & performance

New Flyer CNG technology is built on the proven Xcelsior® transit bus model with more than 10,000 Xcelsior® heavy-duty transit bus models delivered in North America, accumulating over one billion miles of revenue service.

Quick Measurements


Download our complete list of measurements, engine and capacity specs.

Full Specs Sheet
35' 40’ 60’
Length 36'3" 41’0” 60’10”
Height 11'1" 11’ 1” 11’ 1”
Tire Size 305/70R22.5 305/70R22.5 305/70R22.5
Wheelbase 226.75" 283.75” 229” front / 293” rear
Seats 32 40 61
Standees 33 43 62
Wheelchair Locations 2 2 2
Curb Weight 27,000 lb 29,600 lb 43,300 lb
Approach Angle
Departure Angle
Breakover Angle 12º 12º (front) 9º (back)
Engine Cummins L9 CNG Cummins L9 CNG Cummins L9 CNG
Fuel Tank Type 4 Natural Gas Vehicle Fuel Cylinder: 3300 SCF at 3600 psi service pressure Type 4 Natural Gas Vehicle Fuel Cylinder: 3300 SCF at 3600 psi service pressure Type 4 Natural Gas Vehicle Fuel Cylinder: 3300 SCF at 3600 psi service pressure